Electrical insulation evaluation of crosslinked polyethylene nanocomposite blended with ZnO

The development of materials using the concept of composite materials has long been of much interest. Recently, the new field referred to as nano science and technology has emerged, in line with noticeable research advancements that revealed new physical phenomena in the nano-sized ultra micro region, and improved material properties. Cross-linked polyethylene(XLPE) is extensively used for AC high voltage power cable for many years. Because of the risk of space charge under DC electric field in unmodified XLPE, the material is seldom used today for DC applications. [1-3] In this paper, silane treated nano-sized ZnO by varying the contents and nano particle size of the XLPE specimens were made and describes the findings of a study on electrical experimental of insulation material. In order to calculate temperature dependence of XLPE nanocomposite sample, DC dielectric breakdown strength was measured. In addition, experimental data were processed with a weibull probability distribution. In conclusion, changing the content and the particle size of nano-additives for HVDC power cable insulation was applied. In order to apply HVDC power cable insulation, the unipolar DC breakdown strength, and space charge formation under DC polarity reversal breakdown strength were investigated.